Position sensing apparatus

Claim 1

IN A POSITION SENSING APPARATUS, A FIRST MEMBER HAVING A PLURALITY OF MAGNETIC FLUX EMANATING AREAS ARRANGED IN A CODED PATTERN, EACH OF SAID AREAS DEFINING A CONCENTRATION OF FLUX OF A PREDETERMINED POLARITY, SAID PATTERN COMPRISING GROUPS OF AREAS REPRESENTATIVE OF DISTINCT PREDETERMINED POSITIONS; CORE MEMBERS MOUNTED OPPOSITE TO SAID FIRST MEMBER, EACH CORE MEMBER BEING COMPOSED AT LEAST IN PART OF MAGNETIC MATERIAL HAVING AT LEAST TWO REMANENT STATES, AT LEAST A PORTION OF EACH OF SAID CORE MEMBERS BEING SUSCEPTIBLE OF BECOMING SUBSTANTIALLY SATURATED BY RESPECTIVE ONES OF SAID FLUX EMANATING AREAS DEPENDENT UPON THE RELATIVE POSITIONS OF SAID CORE MEMBERS AND SAID FLUX EMANATING AREAS; SAID FIRST MEMBER AND SAID CORE MEMBERS BEING SUSCEPTIBLE OF RELATIVE DISPLACEMENTS WHEREBY SAID CORE MEMBERS ARE POSITIONED WITH RESPECT TO CERTAIN OF SAID AREAS DEPENDENT UPON SAID RELATIVE DISPLACEMENTS; FLUX INDUCING MEANS COUPLED WITH EACH OF SAID CORE MEMBERS FOR SWITCHING THE MAGNETIC MATERIAL IN SAID CORE MEMBERS BETWEEN SAID REMANENT STATES DEPENDENT UPON THE RELATIVE POSITIONS OF SAID CORE MEMBERS AND SAID FIRST MEMBER; AND OUTPUT MEANS RESPONSIVE TO THE FLUX IN SAID CORE MEMBERS FOR PROVIDING SIGNALS REPRESENTATIVE OF SAID PREDETERMINED POSITIONS.